Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3410ab93afe246c…

MALICIOUS

PDF

65.4 KB Created: 2021-06-09 07:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79117d33ba99491bc4ffe1ad5be39a8b SHA-1: bb9332c08871066824a836963915cc522788ffd4 SHA-256: c3410ab93afe246ca116395a149f2431beedd68a4369f0f9b988228b26d39db1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains a link farm pointing to numerous URLs hosted on compromised CMS upload directories, suggesting an attempt to distribute phishing content or malware. The presence of external URIs and a link farm indicates a likely spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8600

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://garglob.ru/uplcv?utm_term=pic+collage+pro+apk
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a745fa3289b---dawejanu.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf7cc73801---38594369161.pdf
    • http://thaimassagemodel.com/ckfinder/userfiles/files/43297399220.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/99f28916bf856b1a34b749995f8699c5/78489741781.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16088036e6ef14---lapekivokok.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/fbf6c08cb2d17bff84e5fb404124b8e0/7183178949.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/471e93f309041a7de70ec6cdb1997672/67540787060.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092547414330---44813025096.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3ca5a67a1---88749738564.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/kazudovejofelipaxivujima.pdf
    • https://penal-garazh.ru/files/mesifufaweveboxalodakinu.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ae55be826---43294938790.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160945992b4dda---gidilowovuliru.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad60128da8---rimolavazisatutaxabivu.pdf
    • https://narimasu-chintai.net/jcfiles/file/5106607156.pdf
    • https://easy2ticket.com/upload/files/45830391897.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160877227a9d3b---83832707730.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607838d9e7490---ponubewegipefet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e454.bin
a82e20abf4248698dbd8414db58fe99599b7fd6a4c2883a21d21a8ce36b6bb31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE454 4988 bytes

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